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      36,000 BTU mini-split heat pump · J-7S

      Fujitsu AOUK036SSAN7

      Average cooling efficiency and very good heating efficiency for a 36,000 BTU mini-split heat pump, and certified for cold climates.

      Ranks #94 of 205 36,000 BTU mini-splits for cooling efficiency, and costs about $970 a year to run in a mixed climate like Atlanta.

      SEER2
      21.7 Cooling efficiency over a season
      Average · beats 42%
      HSPF2
      10.8 Heating efficiency over a season
      Very good · beats 71%
      EER2
      13.6 Cooling efficiency on a 95°F day
      Very good · beats 76%
      Heat at 5°F
      36,400 BTU/h87% of its 47°F output
      Very good · beats 73%

      A good fit if…

      • Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 36,400 BTU/h at 5°F.
      • It will heat most of the year - its HSPF2 beats 71% of mini-splits.
      • You want steady temperatures and quiet running - the compressor varies its speed.

      Think twice if…

      • Nothing stands out - its ratings have no weak spot for its class.

      Calculate my running cost

      Details

      Specifications36,000 BTU, R-32
      General
      BrandFujitsu
      Outdoor unit modelAOUK036SSAN7
      SeriesJ-7S
      TypeMini-split heat pump
      Nominal size36,000 BTU
      CompressorVariable-speed units run longer at low powerContinuously variable
      RefrigerantR-32
      Connected (smart) capableNo
      On the market sinceDecember 10, 2024
      Last certifiedApril 17, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better21.7 (range 16.1-21.7)
      EER2Efficiency at 95°F outdoors11.3-13.6
      Cooling capacity36,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better9.4-10.8
      Capacity at 47°F42,000 BTU/h
      Capacity at 17°F26,200-26,400 BTU/h
      Capacity at 5°F33,800-36,400 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater1.94-2.14
      ENERGY STAR cold climateYes
      Heating output as it gets colder87% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its best matchup at the standard test temperatures, in BTU/h:

      Certified matchups3 indoor units

      The same outdoor unit scores differently with each indoor unit. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitSEER2EER2HSPF2Heat @5°FAHRI ref.
      - FUJITSU · cold climate21.713.610.836,400216372781
      - FUJITSU · cold climate18.912.510.135,000216372786
      - FUJITSU · cold climate16.111.39.433,800216372782
      Yearly running cost in 10 large cities$784-$2,385

      At each state's average electricity price and the city's typical heating and cooling hours.

      Questions4
      What is the SEER2 rating of the Fujitsu AOUK036SSAN7?
      The Fujitsu AOUK036SSAN7 is rated at up to 21.7 SEER2 and 13.6 EER2 for cooling and up to 10.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 3 certified matchups SEER2 ranges from 16.1-21.7.
      Is the Fujitsu AOUK036SSAN7 good for cold climates?
      Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 36,400 BTU/h at 5°F with a COP of 2.14, so it is still 2.1 times as efficient as electric resistance heat at that temperature.
      How much does the Fujitsu AOUK036SSAN7 cost to run per year?
      At its rated efficiency it costs about $784-$2,385 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,007 in Phoenix and $2,023 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      What refrigerant does the Fujitsu AOUK036SSAN7 use?
      It uses R-32.

      Running cost and savings

      Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

      Heat pump $1,020/yrYou save $935/yrSee details ↓
      1. Where you live
      Adjust heating and cooling hours

      Filled in from your city's climate. Change them if you run the system much more or less than usual.

      2. The heat pump Fujitsu AOUK036SSAN7
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,020
      Current system, per year
      $1,954
      You save per year
      $935
      Payback
      14.4 years
      Net after 10 years
      -$4,151

      Cooling $584Heating $436Electricity used: 6,372 kWhSaved vs. a minimum-efficiency heat pump: $494

      Estimates use the unit's rated SEER2 and HSPF2, full-load hours derived from NOAA 1991-2020 degree days, average residential electricity prices from the U.S. EIA (12 months to July 2026) and fuel prices from EIA (2025 for natural gas, week of 2026-10-05 for propane and heating oil). Very cold days that need backup heat are not modelled. Federal minimum for comparison: 14.3 SEER2 / 7.5 HSPF2.

      Similar 36,000 BTU models

      See all 205 36,000 BTU mini-splits, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of April 17, 2026. How we use the data.